Fix phpStan

Author: Nazar65

app/code/Magento/Catalog/Controller/Category/View.php

@@ -9,6 +9,7 @@
 use Magento\Catalog\Api\CategoryRepositoryInterface;
 use Magento\Catalog\Helper\Category as CategoryHelper;
 use Magento\Catalog\Model\Category;
+use Magento\Catalog\Model\Category\Attribute\LayoutUpdateManager;
 use Magento\Catalog\Model\Design;
 use Magento\Catalog\Model\Layer\Resolver;
 use Magento\Catalog\Model\Product\ProductList\ToolbarMemorizer;
@@ -30,7 +31,6 @@
 use Magento\Framework\View\Result\PageFactory;
 use Magento\Store\Model\StoreManagerInterface;
 use Psr\Log\LoggerInterface;
-use Magento\Catalog\Model\Category\Attribute\LayoutUpdateManager;
 
 /**
  * View a category on storefront. Needs to be accessible by POST because of the store switching.
@@ -208,8 +208,10 @@ protected function _initCategory()
      * @return ResultInterface
      * @throws NoSuchEntityException
      */
-    public function execute()
+    public function execute(): ?ResultInterface
     {
+        $result = null;
+
         if ($this->_request->getParam(ActionInterface::PARAM_NAME_URL_ENCODED)) {
             return $this->resultRedirectFactory->create()->setUrl($this->_redirect->getRedirectUrl());
         }
@@ -251,8 +253,9 @@ public function execute()
 
             return $page;
         } elseif (!$this->getResponse()->isRedirect()) {
-            return $this->resultForwardFactory->create()->forward('noroute');
+            $result = $this->resultForwardFactory->create()->forward('noroute');
         }
+        return $result;
     }
 
     /**